antlr4ts
Version:
ANTLR 4 runtime for JavaScript written in Typescript
70 lines • 2.86 kB
JavaScript
;
/*!
* Copyright 2016 The ANTLR Project. All rights reserved.
* Licensed under the BSD-3-Clause license. See LICENSE file in the project root for license information.
*/
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.DefaultEqualityComparator = void 0;
const Decorators_1 = require("../Decorators");
const MurmurHash_1 = require("./MurmurHash");
const ObjectEqualityComparator_1 = require("./ObjectEqualityComparator");
/**
* This default implementation of {@link EqualityComparator} uses object equality
* for comparisons by calling {@link Object#hashCode} and {@link Object#equals}.
*
* @author Sam Harwell
*/
class DefaultEqualityComparator {
/**
* {@inheritDoc}
*
* This implementation returns
* `obj.`{@link Object#hashCode hashCode()}.
*/
hashCode(obj) {
if (obj == null) {
return 0;
}
else if (typeof obj === "string" || typeof obj === "number") {
return MurmurHash_1.MurmurHash.hashCode([obj]);
}
else {
return ObjectEqualityComparator_1.ObjectEqualityComparator.INSTANCE.hashCode(obj);
}
}
/**
* {@inheritDoc}
*
* This implementation relies on object equality. If both objects are
* `undefined` or `null`, this method returns `true`. Otherwise if only
* `a` is `undefined` or `null`, this method returns `false`. Otherwise,
* this method returns the result of
* `a.`{@link Object#equals equals}`(b)`.
*/
equals(a, b) {
if (a == null) {
return b == null;
}
else if (typeof a === "string" || typeof a === "number") {
return a === b;
}
else {
return ObjectEqualityComparator_1.ObjectEqualityComparator.INSTANCE.equals(a, b);
}
}
}
DefaultEqualityComparator.INSTANCE = new DefaultEqualityComparator();
__decorate([
Decorators_1.Override
], DefaultEqualityComparator.prototype, "hashCode", null);
__decorate([
Decorators_1.Override
], DefaultEqualityComparator.prototype, "equals", null);
exports.DefaultEqualityComparator = DefaultEqualityComparator;
//# sourceMappingURL=DefaultEqualityComparator.js.map